RESUMO
BACKGROUND: Few studies have examined the effects of low-dose alcohol consumption on the "lipid peroxidation-antioxidant defense" (LPO-AOD) system of mothers and infants, and on infant growth and development. This study examined effects of alcohol consumption on the LPO-AOD system of pregnant women and newborns and infant development. METHODS: A total of 209 pregnant women were recruited for this prospective study at the first prenatal visit and followed until delivery: 112 consumed alcohol and 97 reported no alcohol use during pregnancy. Infants were evaluated at birth, and at 6 and 12 months of age. The study controlled for the confounding effect of maternal smoking. RESULTS: Biomarkers of lipid peroxidation, for example, thiobarbituric acid reactants, were higher and the activity of the antioxidant defense system was lower in drinkers and their infants. Higher rates of pathological conditions and slower postnatal growth were observed among infants who were prenatally exposed to alcohol. Low-dose alcohol use and tobacco smoking were associated with lower postnatal infant growth trajectories, resulting in restricted growth at 6 and 12 months among infants born to mothers who drank or smoked during pregnancy. Alcohol had a broad effect on the infant and maternal LPO-AOD system, while the effect of smoking was limited in this study to maternal glutathione peroxidase. CONCLUSIONS: Small amounts of alcohol consumed during pregnancy are associated with dysfunction of the LPO-AOD system and development of oxidative stress in women and their children. Identification and preventive interventions are needed for pregnant women who use alcohol in any amount.
